Carton knock-out



H. D. FIELD CARTON KNOGK-OUT July* 24, 192s.

Filed Aug. 8, 1925 Patented July 24, 1928.

uNlv'lao STATES PATENT OFFICE.

HERBERT D. FIELD, F LOS ANGELES, CALIFORNIA, i A'SSIGNOR lOIE ONE-HALF '110 ROBERT C. MOCRYSTAL, 0F LOS ANGELES, CALIFORNIA. i

cAn'roN xNocx-obr.

I Application iled Aug'ust 8, 1925. .Serial No. 49,064.

In this specification, and the accompanying drawing, I shall describe and show a preferred form of my invention, and speciiically mention certain of its more lmportant objects. I do not limit myself to the forms disclosed, since various changes and adaptations .may be made therein without departing from the essence of my inventlon as hereinafter claimed; and objects and advantages, other than those specifically mentioned, are included within its scope.

My invention relates to methods for opening sealed cartons or the like. Among lts salient objects are; lirst, to provide means for pressing a prepared surface, or knockout portion, of the carton inwardly by the finger, to form a-smooth uniform opening4 of suitable size for properly discharging the contents; second, to furnish a way for preventing` the knock-out from dropping into the carton; third, to afford facillties for completely removing the knock-out from the opening v1n a most convenient and expedi tious manner; and, fourth, to supply a device of this nature that will not increase the labor or material costs of manufacture in the slightest, and that is perfectly adapted for the production of cartons in the usual manner.

My objects are ccomplished in the manner illustrated in`; he accompanying drawing, in whichj Figure 1 is a plan view of a carton provided with my improved knock-out, and

ing the manner in which the opening in the carton is effected, and how the knock-out may be removed therefrom:

Similar reference numerals refer to simi- 40 lar parts throughout both views.

` For illustrative purposes I have shown a small rectangular carton 3 of paste board, or similar fibrous materials, having my device in the lupper left hand corner of one of its narrow sides. The' knock-out comprises a nearly complete vcircular area 4, adjoined to a considerably smaller semi-circuar area 5, and thus has a pear-shaped periphery. The outline of the knock-out is formed by aseries of circular cuts, slightly spaced from each other and cut through the material of the carton by a. knife-edged Figure 2 is a perspective view illustratpunch at the same time the carton blanks are formed. In this way the presence of the knock-out does not .in any way add to the pareonly slightly spaced from cut 6 at the points 9; and are considerably more widely spaced from cut 8 at the points 10.. All of the cuts are very narrow so that the resiliency of the material of the carton will keep them closed.

The carton is opened by pressing area 4 inwardly by the index finger 11, in the manner illustrated in Fig. '2. 'This causes the connecting portions 9 to rupture, since they are relatively weak. The stronger connecting portions 10 then act like a hinge and, by torsion of their fibres, permit the knockout to assume the position shown in Fig. 2. Area 4 is then within the carton, andl area 5 extends outwardly and forms a tab which may be grasped between the index finger and thumb for removing the knock-out comletely, by applying a slight additional orce suiiicient to rupture portions 10. The orice left by -removing the knock-out in this manner is smooth-edged and admirably adapted for pouring the contents of the carton therethrough.

It will be apparent that my invention makes it possible to open a carton without using a knife, or mutilating it in any other manner, and that the operation is expeditious and most convenient. It willalso be seen that this has been accomplished without incurrin any additional manufacturing cost, and without detracting in any way from the appearance or utility of the carton.

I desire to point out particularly that when a knock-out portion of any hitherto known type is applied to a carton, v the knock-outl necessarily falls into, or* at least is left partially within, thexcarton. This is objectionable for sanitary reasons and because it interferes with pouring the contents. My invention makes it possible to easily and quickly remove the knock-out without perinitting its possibly contaminated exterior surface to come in Contact with the contents of the carton.

Having thus fully described my invention,

5 I claim:

A dispensin carton having an area in one of its walls de ned by discontinuous incisions forming'a door, said area consisting of an upper relatively iarge nearly complete circular portion, and a lower relatively small semi-circular portion adjoining said upper portion, said portions being uncut on a line joining them, forming links, whereby inward pressure may be applied to the larger portion to cause the same to swing inward- 1y and the smaller portion outwardly on said links.

HERBERT D. FIELD. 

